/*
 * Copyright (c) 2020 - present, Inspur Genersoft Co., Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package com.inspur.edp.lcm.metadata.common.configuration;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.inspur.edp.lcm.metadata.api.exception.LcmConfigResolveDevException;
import com.inspur.edp.lcm.metadata.api.exception.ErrorCodes;
import com.inspur.edp.lcm.metadata.common.FileServiceImp;
import com.inspur.edp.lcm.metadata.common.Utils;
import org.springframework.util.StringUtils;

import java.io.IOException;

/**
 * 引用策略配置加载器
 * @author zhongchq
 * @since 1.0
 */
public class RefStrategyConfigLoader {

    private String refStrategy;
    private static final String FILE_NAME = "config/platform/dev/main/ref_strategy.json";
    private static final String SECTION_NAME = "strategy";
    ObjectMapper objectMapper = new ObjectMapper();
    private String absoluteFilePath;
    public String getAbsoluteFilePath() {
        if (StringUtils.isEmpty(absoluteFilePath)) {
            absoluteFilePath = Utils.getAbsoluteConfigFilePath(FILE_NAME);
        }
        return absoluteFilePath;
    }

    protected String loadRefStrategy() {
        try {
            if (refStrategy != null) {
                return refStrategy;
            }
            FileServiceImp fileService = new FileServiceImp();
            String fileContents = fileService.fileRead(getAbsoluteFilePath());
            JsonNode jsonNode = objectMapper.readTree(fileContents);
            refStrategy = jsonNode.findValue(SECTION_NAME).textValue();
            return refStrategy;
        } catch (IOException e) {
            throw new LcmConfigResolveDevException(e, ErrorCodes.ECP_CONFIG_RESOLVE_DEV_0002, getAbsoluteFilePath());
        }
    }
}
